I'm following this thread... I plan on installing the ECHO UAT with SkyFYX-EXT sometime next summer. I have an early 12 with D-180 and GTX 327. I want to mount the Sky GPS antenna next to the Garmin GPS antenna on the angle bracket under the cowling at the top of the firewall. Don't know yet where the ADS-B receiver will mount - I'm thinking behind the baggage compartment rear bulkhead.

The GA35 antennas from Garmin are somewhat (in)famous for acting as GPS jammers. Garmin claims this is caused by applying excessive torque to the antenna fasteners. I'm still not convinced as I've seen this same failure when no mounting screws were used.

Either way, it's quite possible for one GPS antenna to fail and become a jammer which will take out all the other GPS receivers on the airplane. Antenna separation won't help appreciably when this particular failure strikes. Switching off the offending GPS system is the only way to turn off the jamming and allow your other GPS receivers to work.

(For what it's worth, I have two of the little puck GPS antennas from GRT mounted side by side. They seem quite happy and in fact produce the best receive sensitivity of any GPS receivers I've ever owned.)

I have just installed the echo, seems to work fine on the ground, i see traffic around.. Have not yet taken a flight.
Very simple install, I installed the echo skyfy-EXT next to my garmin on the front firewall.

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Rico Burgos
RV9a at KWHP - Just out of Phase I
C-150 at KMOD

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